When using the quantity theory, how will the following events affect the money supply, V, and nominal

Question:

When using the quantity theory, how will the following events affect the money supply, V, and nominal income (or $GDP)?
Event A: Because of widespread bank failures, the public increases its cash holdings.
Event B: Credit cards become widely used.
Event C: The money supply is reduced.
Event S: The nominal interest rate rises.

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